Unlock instant, AI-driven research and patent intelligence for your innovation.

Forward osmosis-reverse osmosis coupled concentration system and use method thereof

A concentration system and reverse osmosis technology, applied in the field of reverse osmosis, can solve the problems of increased energy consumption and cost, low concentration limit, low recovery rate of brine water, etc., to achieve the goal of improving water recovery rate, reducing energy consumption and operating costs Effect

Active Publication Date: 2020-11-27
CHNA ENERGY INVESTMENT CORP LTD +1
View PDF7 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the above-mentioned forward osmosis coupled reverse osmosis system, under normal operating pressure conditions, the concentration limit of the reverse osmosis unit is low, so that the concentration limit of the forward osmosis unit to the brine is low, resulting in a low recovery rate of water containing brine; and If ultra-high pressure reverse osmosis is used to increase the concentration limit of the system, energy consumption and cost will be greatly increased

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Forward osmosis-reverse osmosis coupled concentration system and use method thereof
  • Forward osmosis-reverse osmosis coupled concentration system and use method thereof
  • Forward osmosis-reverse osmosis coupled concentration system and use method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The concentrating system of forward osmosis coupling reverse osmosis implemented by the present invention, such as figure 2 As shown, the forward osmosis unit group 1 includes a forward osmosis unit 11, the reverse osmosis unit group 2 includes two reverse osmosis units 21, and the two reverse osmosis units 21 are successively the first reverse osmosis unit along the filtrate flow direction of the reverse osmosis unit 21 211 and a second reverse osmosis unit 212, each reverse osmosis unit 21 includes a liquid inlet, a non-filtrate outlet and a filtrate outlet. The liquid inlet of the first reverse osmosis unit 211 communicates with the draw solution outlet of the forward osmosis unit 11 , so that the draw solution carrying brine water after forward osmosis can enter the reverse osmosis unit group 2 . The correction rejection rate of the first reverse osmosis unit 211 is relatively low, so that the first reverse osmosis unit 211 can obtain unfiltered liquid with the sam...

Embodiment 2

[0048] The difference from Example 1 is that the concentration system of forward osmosis coupling reverse osmosis in the embodiment of the present invention, such as image 3 As shown, the reverse osmosis unit group 2 includes three reverse osmosis units 21, the first reverse osmosis unit 211, the second reverse osmosis unit 212 and the third reverse osmosis unit 213 in sequence along the filtrate flow direction of the reverse osmosis unit group 2, each Each reverse osmosis unit 21 all comprises liquid inlet, unfiltrate outlet and filtrate outlet; The filtrate outlet is communicated with the draw solution, the filtrate outlet of the first reverse osmosis unit 211 is communicated with the liquid inlet of the second reverse osmosis unit 212, and the unfiltrate outlet of the second reverse osmosis unit 212 is connected with the liquid inlet of the first reverse osmosis unit 211 connected, the filtrate outlet of the second reverse osmosis unit 212 is communicated with the liquid i...

example 1

[0085] In example 1, the concentration of seawater to be treated is 30000mg / L, and the volume flow rate is 20m 3 / h, by figure 2 In the system treatment shown, the draw solution is 100,000 mg / L sodium chloride brine, and the operating pressure of the reverse osmosis unit 21 is 6.5 MPa. When the system is running stably, the flow rate and salinity of the feed and discharge of each unit are shown in the table below.

[0086]

[0087]

[0088] It should be noted that the concentration system of forward osmosis coupled with reverse osmosis in the embodiment of the present invention is suitable for various brine-containing fresh water extraction or liquid concentration. The liquid solvent can be water or other solvents, such as alcohols, liquid The solutes can be salts, such as sodium oxide, magnesium chloride, lithium sulfate, lithium chloride, etc., or small molecular organic compounds.

[0089] In the description of this specification, specific features, structures or c...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a forward osmosis-reverse osmosis coupled concentration system and a use method thereof, belonging to the technical field of osmosis. According to the invention, under the condition of a normal operation pressure, the concentration limit of reverse osmosis units can be improved, the energy consumption and cost of the reverse osmosis units can be reduced, and the water recovery rate of forward osmosis units to salt-containing water is increased. The forward osmosis-reverse osmosis coupled concentration system in the invention comprises a forward osmosis unit group and areverse osmosis unit group, wherein the reverse osmosis unit group comprises at least two reverse osmosis units; the at least two reverse osmosis units are connected in series along a filtrate circulation direction; the corrected rejection rate of the downstream reverse osmosis unit in the adjacent reverse osmosis units is greater than the corrected rejection rate of the upstream reverse osmosis unit; and the forward osmosis unit group communicates with salt-containing water and a draw solution, moisture in the salt-containing water moves to one side of the draw solution under the action of osmotic pressure, and after the action of the forward osmosis units, the draw solution carrying the moisture in the salt-containing water flows into the reverse osmosis unit group. The system and the method are used for desalination treatment of salt-containing water.

Description

technical field [0001] The invention relates to the technical field of reverse osmosis, in particular to a forward osmosis coupled reverse osmosis concentration system and a use method thereof. Background technique [0002] The shortage and pollution of water resources, especially fresh water resources, is a major problem facing the global environment. Desalination of seawater, desalination of salt water, and recycling of sewage and wastewater are important development directions to solve the shortage of water resources. Among them, reverse osmosis technology using membrane technology occupies an increasingly important position in seawater desalination or salt water desalination treatment. [0003] The prior art provides a forward osmosis coupled reverse osmosis system, such as figure 1 As shown, it includes forward osmosis unit 01, reverse osmosis unit 02, saline water storage tank 03, and draw liquid storage tank 04. Forward osmosis unit 01 uses salts with high solubility...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/44
CPCC02F1/441C02F1/445Y02A20/131
Inventor 何灿刘兆峰海玉琰熊日华
Owner CHNA ENERGY INVESTMENT CORP LTD